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      1 /*
      2  * libjingle
      3  * Copyright 2004--2005, Google Inc.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions are met:
      7  *
      8  *  1. Redistributions of source code must retain the above copyright notice,
      9  *     this list of conditions and the following disclaimer.
     10  *  2. Redistributions in binary form must reproduce the above copyright notice,
     11  *     this list of conditions and the following disclaimer in the documentation
     12  *     and/or other materials provided with the distribution.
     13  *  3. The name of the author may not be used to endorse or promote products
     14  *     derived from this software without specific prior written permission.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
     17  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     18  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
     19  * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     20  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     21  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
     22  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
     23  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
     24  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
     25  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26  */
     27 
     28 #include "talk/xmpp/xmppstanzaparser.h"
     29 
     30 #include "talk/xmllite/xmlelement.h"
     31 #include "talk/base/common.h"
     32 #include "talk/xmpp/constants.h"
     33 #ifdef EXPAT_RELATIVE_PATH
     34 #include "expat.h"
     35 #else
     36 #include "third_party/expat/v2_0_1/Source/lib/expat.h"
     37 #endif
     38 
     39 namespace buzz {
     40 
     41 XmppStanzaParser::XmppStanzaParser(XmppStanzaParseHandler *psph) :
     42   psph_(psph),
     43   innerHandler_(this),
     44   parser_(&innerHandler_),
     45   depth_(0),
     46   builder_() {
     47 }
     48 
     49 void
     50 XmppStanzaParser::Reset() {
     51   parser_.Reset();
     52   depth_ = 0;
     53   builder_.Reset();
     54 }
     55 
     56 void
     57 XmppStanzaParser::IncomingStartElement(
     58     XmlParseContext * pctx, const char * name, const char ** atts) {
     59   if (depth_++ == 0) {
     60     XmlElement * pelStream = XmlBuilder::BuildElement(pctx, name, atts);
     61     if (pelStream == NULL) {
     62       pctx->RaiseError(XML_ERROR_SYNTAX);
     63       return;
     64     }
     65     psph_->StartStream(pelStream);
     66     delete pelStream;
     67     return;
     68   }
     69 
     70   builder_.StartElement(pctx, name, atts);
     71 }
     72 
     73 void
     74 XmppStanzaParser::IncomingCharacterData(
     75     XmlParseContext * pctx, const char * text, int len) {
     76   if (depth_ > 1) {
     77     builder_.CharacterData(pctx, text, len);
     78   }
     79 }
     80 
     81 void
     82 XmppStanzaParser::IncomingEndElement(
     83     XmlParseContext * pctx, const char * name) {
     84   if (--depth_ == 0) {
     85     psph_->EndStream();
     86     return;
     87   }
     88 
     89   builder_.EndElement(pctx, name);
     90 
     91   if (depth_ == 1) {
     92     XmlElement *element = builder_.CreateElement();
     93     psph_->Stanza(element);
     94     delete element;
     95   }
     96 }
     97 
     98 void
     99 XmppStanzaParser::IncomingError(
    100     XmlParseContext * pctx, XML_Error errCode) {
    101   UNUSED(pctx);
    102   UNUSED(errCode);
    103   psph_->XmlError();
    104 }
    105 
    106 }
    107